84results about How to "Meet the need for control" patented technology

The embodiment of the invention relates to a method and a device for choosing a screen of a remote presentation system. The method comprises the following steps of: receiving a first input instruction provided in a first touch input operation manner; selecting a display mode according to the first input instruction, wherein the display mode comprises a single-screen mode, a multi-picture mode and a multi-screen mode; and controlling the screen to display a meeting place picture according to the display mode. In the embodiment of the invention, a user can select a display mode by a first touch input operation way and control the screen to display a wanted meeting place picture so that the user can see any wanted meeting place picture; and therefore, the usability is improved and the requirements of controlling the meeting by the user are met.

A self-adaption reverse-pushing controlling permanent magnet synchronous motor direct torque control (DTC) system comprises an inverter which is connected with a signal detecting circuit and a permanent magnet synchronous motor, the permanent magnet synchronous motor is connected with the signal detecting circuit and a processor, and the signal detecting circuit is connected with the processor which is connected with the inverter. The inverter outputs three-phase alternating current to the permanent magnet synchronous motor, current signals of the permanent magnet synchronous motor are output to the signal detecting circuit, rotating speed pulse signals of the permanent magnet synchronous motor are output to the processor, the current signals of the signal detecting circuit are output to the processor, and the processor outputs switch signals to the inverter. A control method of the self-adaption reverse-pushing controlling permanent magnet synchronous motor DTC system utilizes the self-adaption reverse-pushing control theory, a speed reverse-pushing controller and a flux linkage torque self-adaption reverse-pushing controller are utilized for being used for producing components of voltage on a rest frame, a space vector modulation method is combined to produce appropriate inverter switch signals, and a permanent magnet synchronous motor is further controlled.

The invention discloses a managed gigabit industrial Ethernet switch supporting a technology for quickly recovering redundancy within 5 ms and meeting requirements of a rail traffic control system. By adoption of a new redundancy algorithm, master and slave switches are selected, and a normal link and a backup link are determined; the communication state of a port is determined by using an interrupted and polling monitoring method; switching between the backup link and the normal link is realized by changing the state of the port; and the recovery time of a gigabit redundancy technology is shortened to be less than 5 ms, and the recovery time of a megabit redundancy technology is shortened to be less than 15 ms.

The invention relates to a servo controller of a dual-DSP-based 3-DOF (degrees of freedom) planar motor. The servo controller comprises a master control unit and a slave control unit, which respectively comprise a DSP chip, an optical coupling driving isolation module, a full-bridge power driving module and a position sensor module. The DSP chip of the master control unit transmits a PWM signal, controls the full-bridge power driving module to output 6-phase planar motor driving current after optical coupling isolation and collects the X-coordinate position of the two-path planar motor by a laser position sensor; the DSP chip of the slave control unit transmits a PWM signal, controls the full-bridge power driving module to output 6-phase planar motor driving current after optical coupling isolation and collects the X-coordinate position of the one-path planar motor by the laser position sensor; the DSP chips of the main control unit and the slave control unit exchange synchronous control signals in real time through a CAN bus and use a 3-DOF synchronous control strategy to control the planar motor to realize fast and accurate positioning of the degree of freedom on X coordinate, Y coordinate and Theta Z.

The invention discloses a proton exchange membrane fuel cell humidity control method based on an auto-disturbance-rejection control method. The method comprises the following steps: step 1, establishing a PEMFC dynamic water management model which mainly comprises a cathode water balance model, an anode water balance model, a membrane hydration model and a voltage model; step 2, performing humidity control on the dynamic water management model of the fuel cell by means of the anti-interference performance and the inhibition performance of an auto-disturbance-rejection control technology, and adjusting the working humidity of the cell by controlling the air inlet humidity of a cathode; and step 3, carrying out simulation analysis by using Matlab and Simulink, and comparing the humidity control of the auto-disturbance-rejection control technology with the humidity control of the traditional PID control and fuzzy PID control method. Compared with a traditional PID controller and a fuzzy PID controller, an auto-disturbance-rejection controller improves the anti-interference and tracking control performance of the humidity of the proton exchange membrane fuel cell, has higher control precision, higher response speed and smaller overshoot, and can better meet the control requirement.

The invention discloses a group call establishment method based on a digital trunked communication system, a network side equipment. The method comprises steps that a network side receives a group call request message which is from a calling terminal and aims at a special group; uplink resources are distributed to the calling terminal, wireless uplink special bearing is established, downlink resources are distributed to all the trunked terminals in the group on an origination evolution base station (eNodeB), wireless downlink sharing bearing is established, T1 bearing is established for all the trunked terminals in the group of the origination eNodeB, regional gathering is realized according to present positions of the members in the group, paging is initiated to the members in the group, downlink resources are distributed to all the trunked terminals having paging responses in the group of the origination eNodeB, wireless downlink sharing bearing is established, T1 bearing is established for all the trunked terminals having the paging responses in the group of the origination eNodeB; the calling terminal is granted with a word right, the called trunked terminals are notified, and calling establishment is accomplished. The group call establishment method realizes resource establishment according to a present position of a user and carries out group call.

The invention provides an application program response method and system, a storage medium and a communication module. The method comprises the steps: obtaining an awakening source of the communication module when the communication module is awakened from a power-saving mode; judging whether the wake-up source is a preset wake-up source or not; if not, executing a local control function of the preset program so as to locally respond to the application program request. When a wake-up source except a preset wake-up source is acquired, a local control function of a preset program is adopted; theapplication program request is quickly responded locally; when a preset program runs, only a processor on the communication module is used, no communication function is used, and therefore the systeminitialization time after the communication module is awakened is greatly shortened; the App response time delay is shortened to be within 5 milliseconds from 2-3 seconds, the real-time control requirements of all low-power-consumption IoT systems can be basically met, a system control MCU can be completely removed from a low-power-consumption IoT product in hardware design, and the hardware costof the low-power-consumption IoT product is reduced.

A fluid control valve comprises a valve body (1), a valve core (2), a cover plate (3) and a rocker arm (4). The valve core (2) is connected with the rocker arm (4) and positioned in the valve body (1), the cover plate (3) covers the valve core (2), and the rocker arm (4) is driven by external force to drive the valve core (2) to rotate so as to control flow passage connection and disconnection. Control of fluid connection and disconnection and two flow directions can be realized according to requirements by the fluid control valve. The fluid control valve has advantages of small size, low airflow loss, realization of noncontact seal, applicability to high-temperature fluid and the like, different flow rate requirements can be met conveniently through structural size parameter modificationaccording to different flow area demands, and accordingly design as required can be realized.

The invention discloses a weak nonlinear network control method based on a direct inverse control algorithm. The weak nonlinear network control method comprises the following steps of (1) calculating the spatial position of a network signal; (2) compensating an error of the network signal by means of the least-square interpolation estimation algorithm, replacing a current network signal detection result with an interpolation estimation result, obtaining a stability coefficient of the network signal by means of operation, and obtaining a weak nonlinear network signal control basis; (3) building a weak nonlinear control inverse model; (4) building a weak non-linear network signal control model. According to the weak nonlinear network control method, control over a weak nonlinear control system is conducted by means of the direct inverse control algorithm, and the signal to noise ratio of the network signal can be increased; meanwhile stability of the network signal is improved, and therefore the requirement for control over the network signal is met.

The invention discloses an AC servo electric cylinder driving control circuit for an infrared warning stable platform. The control circuit comprises a DSP main control circuit, an FPGA data processingcircuit, an intelligent power driving circuit, a current collecting circuit, a rotary transformer angle measuring circuit and an interface circuit, wherein the DSP main control circuit is used for carrying out vector calculation and servo control of an electric cylinder, the FPGA data processing circuit is used for carrying out data communication with the interface circuit and carrying out data processing, the intelligent power driving circuit comprises an intelligent power module and a magnetic isolation module, the DSP main control circuit is connected with the electric cylinder sequentially through the magnetic isolation module and the intelligent power module, the current collecting circuit comprises a current sensor circuit and an A/D conversion circuit, and the rotary transformer angle measuring circuit is used for acquiring angle measuring data of the electric cylinder and sending the data to the FPGA data processing circuit for angle measuring data processing. The control circuit is advantaged in that system design is simplified, the space and cost of the whole equipment are saved, and anti-interference capability and reliability of the whole equipment are improved.

The invention relates to an unmanned aerial vehicle and control method thereof, and also relates to a control terminal and control method thereof. At least two shooting equipment (11, 12) is arrangedon the unmanned aerial vehicle, and the control method comprises the steps: a first shooting command transmitted by the control terminal is received, the at least two shooting equipment (11,12) is controlled to shoot at the same time according to the first shooting command, and one of the at least two shooting equipment (11,12) is controlled to shoot according to a second shooting command. According to the unmanned aerial vehicle and the control method thereof, the shooting efficiency of the shooting equipment is improved, and the intelligent level is high.

The invention provides a method and a system for controlling active power of a flexible direct current transmission system. The control method comprises the steps of: when active power regulation signals are received, determining the working condition of a converter station according to a power reference value of a main pole control system/main unit and the received active power regulation value;and according to the received active power regulation value, the power upper limit and the power lower limit of each pole control system and the power reference value, calculating the active power regulation value of the main pole control system/main unit and a slave pole control system/slave unit of the converter station in each working condition. The technical scheme regulates the active power regulation value of the main pole control system/main unit and a slave pole control system/slave unit of the converter station in each working condition to allow the flexible direct current transmission system to regulate the active power component to meet the control demand for the control mode of the flexible direct current transmission system and the working condition so as to improve the reliability of the flexible direct current transmission system.

The invention discloses an implementation for a mobile phone having wireless signal remote control and electronic lock functions. Function modules of wireless signal remote control processors with electronic locks are added to mobile phones having various functions, the mobile phones are locked and opened by remote control, other functions are operated and used by remote control, the run and operation of system functions and the use of partial functions are finished separately. When the mobile phones are lost, personal information can be prevented from being used by others. The mobile phones got by illegal ways lost practical use value, thus the occurrence of mobile phones theft is effectively reduced. The remote controllers can be designed to be a more fashionable and personal carrying articles. A large power battery and a super large screen are configured, although the volume is enlarged, the convenient operation of basic functions is not affected. The mobile phones can meet the requirement that parents wants to control the children's use of mobile phones. The implementation can be applied to mobile phones having various functions, and has big market potential; wireless signal remote control and electronic lock functions have an optimistic view.

The invention provides an isolation converter. The isolation converter comprises a power conversion circuit, a first sampling circuit and a second sampling circuit, wherein the power conversion circuit comprises an isolation variable voltage circuit and a control circuit, input ends of the first sampling circuit and the second sampling circuit are both connected with the isolation variable voltage circuit, and output ends of the first sampling circuit and the second sampling circuit are both connected with the control circuit; and the first sampling circuit comprises a high-speed analog-to-digital converter, the second sampling circuit comprises a low-speed analog-to-digital converter, and the isolation variable voltage circuit is respectively connected to the control circuit through the high-speed analog-to-digital converter and the low-speed analog-to-digital converter. The invention also provides a medical imaging system and an X-ray generating device applying the isolation converter. The isolation converter provided by the invention can comprehensively consider hardware cost on the premise of ensuring control performance, and has wide application prospect.

The invention provides a method, apparatus and system for implementing a DIAMETER signaling gateway, and relates to the field of mobile communication. The method comprises the following steps: performing routing analysis on received load sharing data to obtain an analysis exit; and determining a flow exist of the load sharing data according to the congestion degree of the analysis exit. Therefore smooth interconnection of signaling between an LTE network and a 2G/3G network is realized, the complexity of direct connection between DIAMETER network elements is reduced, an IP network better satisfy the service and flow control demands in the future, and meanwhile the network monitoring difficulty is greatly reduced.

The invention relates to the technical field of valves, and discloses a flow control valve, a vehicle suspension shock absorber assembly and a vehicle suspension system. The flow control valve comprises a valve body assembly and multiple high-speed switch valves; the valve body assembly comprises a main valve body, multiple mounting parts are arranged on the main valve body, oil inlet holes and oil outlet holes which communicate with the interiors of the mounting parts are formed in the positions, located on the mounting parts, of the main valve body correspondingly, and the oil inlet holes communicate with the corresponding oil outlet holes to form multiple oil channels arranged in parallel; the high-speed switch valves are arranged in the mounting parts respectively and are in sealing fit with the mounting parts, and the on-off states of the oil channels are controlled by controlling opening and closing of the high-speed switch valves. The flow control valve has the characteristics of being large in flow adjusting range, high in response speed and high in flow control precision, and can be applied to different working conditions.